Properties of the Number -1900

Nine Hundred

Basics

Value: -1901 → -1900 → -1899

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5 ² × 19

Divisors: 1, 2, 4, 5, 10, 19, 20, 25, 38, 50

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11101101100

Octal: -3554

Duodecimal: -1124

Hexadecimal: -76c

Square: 3610000

Square Root: 43.58898943540674

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Matrix inverse of A008459 (squares of entries of Pascal's triangle). A55133

Expansion of g.f.: -x*(1 - 2·x + 6·x² - 2·x³ + x⁴)/((1-x)³*(1+x)⁴). A122576

Expansion of 1/(x¹⁰*p(x + 1/x)), where p(x) = 1 - x³ - x⁵ - x⁷ + x¹⁰ is a Salem polynomial. A143471

Expansion of ∏_{i>=1, j>=1, k>=1} (1 - x^i·j*k)/(1 + x^i·j*k). A321241

Expansion of 1/(1+x²-x³+x⁴). A129903

Consider primitive pairs of integers (b, c) with b < 0 such that x⁵ + b·x + c = 0 is irreducible and solvable by radicals: sequence gives values of b. A371557

Number of primes <= 2ⁿ. A7053

Generalized 13-gonal numbers: m*(11·m-9)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A195313

Number of compositions of n that are neither weakly increasing nor weakly decreasing. A332834

Triangular numbers plus quarter squares: n*(n+1)/2 + floor(n²/4) (i.e., A000217(n) + A002620(n)). A6578